Fuel injection system



FIG. 1 is a top plan view of a fuel injection system showing my new design;

FIG. 2 is a right side elevational view;

FIG. 3 is a bottom plan view;

FIG. 4 is a rear elevational view;

FIG. 5 is a front elevational view; and,

FIG. 6 is a perspective view. 

The ornamental design for a fuel injection system, as shown. 